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From "Doris Gu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-12561) FavoredNodes should shuffle if more than replicas and make writer first if present at BlockPlacementPolicyDefault#chooseTarget
Date Fri, 29 Sep 2017 05:34:00 GMT

    [ https://issues.apache.org/jira/browse/HDFS-12561?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16185376#comment-16185376
] 

Doris Gu commented on HDFS-12561:
---------------------------------

I've reported the same issue last year, please check:
https://issues.apache.org/jira/browse/HDFS-11104 

> FavoredNodes should shuffle if more than replicas and make writer first if present at
BlockPlacementPolicyDefault#chooseTarget
> ------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: HDFS-12561
>                 URL: https://issues.apache.org/jira/browse/HDFS-12561
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: block placement
>            Reporter: DENG FEI
>         Attachments: HDFS-12561-trunk-001.patch
>
>
> As default behavior,will choose in the front of favorite nodes, may lead to unbalance(IO/Storage)



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